package com.google.code.mochaccino.framework.ui.components;
/*
 * Copyright 2012 Claude Houle claude.houle@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import freemarker.ext.beans.BeansWrapper;
import freemarker.ext.beans.CollectionModel;
import java.util.ArrayList;
import java.util.List;

/** The RadioButtonSet is a POJO for representing a collection of RadioButton. */
public final class RadioButtonSet {
	private List<RadioButton> buttons = new ArrayList<RadioButton>();

	/** Constructor */
	public RadioButtonSet() {
	}

	/** Add a Radio Button */
	public void add( String id, String label ) {
		add( new RadioButton( id, label ) );
	}

	/** Add a Radio Button */
	private void add( RadioButton button ) {
		for ( RadioButton btn : buttons ) {

			if ( btn.getId().equals( button.getId() ) ) {
				throw new IllegalArgumentException( "A radio button with specified id already exist." );
			}

			if ( button.isChecked() && btn.isChecked() ) {
				btn.setChecked( false );
			}
		}
		buttons.add( button );
	}

	/** Add a checked radio button */
	public void addChecked( String id, String label ) {
		add( new RadioButton( id, label, true ) );
	}

	/** Transform to Freemarker Model Reprensetation */
	public CollectionModel toModel() {
		return new CollectionModel( buttons, BeansWrapper.getDefaultInstance() );
	}
}
